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    <title>Document</title>
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<body>
    <script>
        /* 
            继承: extends 关键字
                语法:
                    class 子类名 extends 父类名 {

                    }
            继承：子类继承了父类成员(属性和方法);        
        */
        class Person {
            constructor(name, age) {
                this.name = name;
                this.age = age;
            }

            play() {
                console.log('今晚吃鸡');
            }
        }
        class Student extends Person {

        }

        let eason = new Student('eason', 22);
        // 子类继承了父类的构造函数
        console.log(eason.name);
        // 子类继承了父类的方法
        eason.play();

    </script>
</body>

</html>